2003 HILUX HAZARD SWITCH MOD

[JAMES399]

The right hand directional signal stopped working on my 2003 Hilux, so
started looking for the problem. Checked out everything and found
that the hazard switch was the culprit. With the switch removed and
jumper wires installed to simulate being in the Flasher “OFF” mode,
the RH turn signal began to work.

My truck is fitted with a dual-fuel conversion (gasoline or compressed natural gas). The location of the gas/CNG selector switch and fuel level indicator (lower left hand side of the dash) was hard to see. The hazard switch cutout was a much better location. The rear window defogger switch cutout was a perfect location for a new hazard switch

A factory replacement hazard switch costs 285,000 Colombian pesos (about $95 USD). Being a cheap-ass, I decided to replace the stock switch with an on/off switch and a relay.

After checking out the Hilux Hazard switch circuit, it looked like a 4PDT relay would work.

The parts:

switch.jpg (9.71 KiB) Viewed 5578 times

1.) SPST red hazard switch w/led (Ebay - $4.95/free ship)
2.) 1N4001 diode
3.) 4 pole double-throw relay with 12v coil
4.) Hookup wire and double-sided sticky tape.
5.) 1/8” male solderless connectors

Drew up a connecting diagram.

I wanted to retain the original hazard switch plug and not have to cut
up the factory wiring harness. Soldered wires to the contacts on the
original hazard switch, and used it as a jack to connect to the wiring
harness plug.

The completed relay and switch assembly.

relay assembly.jpg (12.16 KiB) Viewed 5578 times

Installed on the rear of the dash panel

The final installation.

The CNG/Gasoline selector installed in the original hazard switch location below the clock, and the new hazard switch in the rear defogger location

This was an easy mod, and it worked perfectly. I put the switch and
relay assembly together on my bench, and installing it was simply a
matter of enlarging the switch cutout slightly and then plugging in
everything. Total cost of parts was 24 000 COP ($8 USD). Project took
about a week from start to finish. Well worth the time.

- JAMES

[Mud Dog]

Well done James!
With a little savvy, some know-how and the will to do it, the possibilities are almost endless and you've harnessed those qualities to sidestep a dealer OEM spares rip-off and perhaps even improve on the original layout (for your needs anyway). Thanks for sharing.

[drew3]

Thanks for sharing. Im interested to know how you got the dash shroud around the clock and original hazard button position off? Or did you work from underneath?

[JAMES399]

Thanks for sharing. Im interested to know how you got the dash shroud around the clock and original hazard button position off? Or did you work from underneath?

The dash on my 'Lux is made up of 5 pieces. Only the lower two pieces had to be removed to access the hazard switch and clock.
- JAMES